["Dennis Schneck" <dennisschneck@xxxxxx>]

 

Hello Anne, Hello Hugo,

I tryed to get some statistics ( smb2, RTT, data usage ).

 

 

Gesendet: Montag, 28. August 2017 um 17:35 Uhr
Von: "Anne Blankert" <anne.blankert@xxxxxxxxx>
An: "Community support list for Wireshark" <wireshark-users@xxxxxxxxxxxxx>
Betreff: Re: [Wireshark-users] How to find the bottleneck?

* Are you sure the branch has a 1 GB/s connection to HQ? 1GB/s possible, but quite good for current standards.

* The network is as slow as the slowest link. Are you sure that the slowest link between the branch client and HQ server is 1GB/sec? If traffic is routed over public internet between branch and HQ, there are likely some bottlenecks beyond your control

* Is there network latency between branch and headquarters? Even on high bandwidth connections, network latency can cause low data transfer rates because some protocols are very chatty: the next packet is sent only after receiving acknowledgment for the previous packet. With high latency networks, this may result in sometimes very poor transfer speeds

 

 

 

2017-08-28 14:37 GMT+02:00 Dennis Schneck <dennisschneck@xxxxxx>:

Hello,
the following scenario

headquarter:  Server (AIX) and client (Windows)

branch: client (Windows)

 

If the Clients from the branch open a project from the server in the headquarter
it takes about 5 times longer than the same project open in headquarters.
The bandwith from the branch is 1 GB/s for the hole company.
So OK it takes longer in the branch but 5 times.

The Data is on the Storage System.

How to find the bottleneck in the network ?
The networkadmin is sure all is fine.

 

made a IO Graph from "tcp.seq" from one of some sample Data I got from the Users

 

SPW = BAD = branch

SPG = GOOD = headquarter

Thanks
Dennis

 

 

 

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Attachment: branch.png
Description: PNG image

Attachment: branch2.png
Description: PNG image

Attachment: headquarter.png
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Attachment: headquarter2.png
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Headquarter

===========================================================================
SMB2 Service Response Time Statistics - Szenario2_Archiv_erstellen:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
SMB2              
Negotiate Protocol          0      2     0.000321     0.080089     0.040205     0.080410
Session Setup               1      3     0.004582     0.070624     0.041991     0.125973
Session Logoff              2      1     0.000229     0.000229     0.000229     0.000229
Tree Connect                3      2     0.001569     0.065449     0.033509     0.067018
Tree Disconnect             4      2     0.000200     0.000238     0.000219     0.000438
Create                      5    246     0.000234     0.016898     0.001055     0.259594
Close                       6    284     0.000162     0.003184     0.000454     0.129023
Read                        8   2214     0.000262     0.042841     0.008521    18.866242
Write                       9   2942     0.000368     0.011055     0.001241     3.650073
Ioctl                      11     19     0.003878     0.443808     0.076570     1.454826
Find                       14     32     0.000309     0.002893     0.000851     0.027236
Notify                     15      3     0.631542     0.656424     0.643896     1.931687
GetInfo                    16    421     0.000186     0.096259     0.008743     3.680854
SetInfo                    17      3     0.000453     0.001005     0.000662     0.001987
---------------------------------------------------------------------------


Branch

===========================================================================
SMB2 Service Response Time Statistics - Szenario_2__packen:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
SMB2              
Negotiate Protocol          0      1     0.007877     0.007877     0.007877     0.007877
Session Setup               1      2     0.008178     0.013942     0.011060     0.022120
Session Logoff              2      1     0.007866     0.007866     0.007866     0.007866
Tree Connect                3      1     0.008156     0.008156     0.008156     0.008156
Tree Disconnect             4      1     0.007882     0.007882     0.007882     0.007882
Create                      5   1019     0.000478     0.056522     0.008295     8.452420
Close                       6    915     0.000247     0.320530     0.009274     8.485293
Read                        8   6911     0.006126     0.051485     0.015365   106.187011
Write                       9    841     0.005888     0.032329     0.007638     6.423687
Ioctl                      11    563     0.007676     0.009851     0.008125     4.574331
Find                       14    144     0.000956     0.037852     0.010477     1.508628
Notify                     15      7     0.511076     1.589067     0.798229     5.587600
GetInfo                    16    512     0.000478     0.030098     0.008079     4.136519
Break                      18      7     0.005709     0.013768     0.008902     0.062311
---------------------------------------------------------------------------